原式=(36/11x35.7-36/11x26.69+18/55x19.9)x(2.5-5/12-7/36)=[36/11x(35.7-26.69)+18/55x19.9]x(2.5-5/12-7/36)=(36/11×9.01+18/55x10×1.99)x(2.5-5/12-7/36)=36/11×(9.01+1.99)x(2.5-5/12-7/36)=3...
(3又3/11x35.7-3又3/11x26.69+18/55x19.9)x(2.5-5/12-7/36)简便运算
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